The Master is back!

Mateusz Masternak (31-1, 23 KOs) scored a fourth round knockout victory over Sandro Siproshvili (27-18, 13 KOs) at the Arena Nord in Frederikshavn, Denmark.

The Polish cruiserweight took control of the early rounds before landing a big right hand in the fourth, which sent his opponent to the floor and down for the count.